Bitcoin Backbone Helps Small Miners in Matt Corrallo’s Relay Network

The best known of these is “the” relay network, introduced in 2014 and maintained by Bitcoin Core developer Matt Corallo: “It’s centralizing, but, hopefully, democratizing.” On propagation Corallo’s relay network serves two distinct purposes.
Rather than just needing to rely on the peer-to-peer network, Bitcoin users can opt to receive transaction data and blocks through an alternative channel.
This makes it harder to successfully attack the Bitcoin network; the relay network functions as a fallback.
But unlike Bitcoin’s original peer-to-peer network, Corallo’s relay network is centrally controlled: by Corallo.
“The relay network gives smaller miners a leg up, since they don’t need to spend a proportionally large portion of their resources to establish these types of relay networks themselves.